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(Solved): [10 points] An elastic-perfectly plastic material element is subjected to proportional loading. The ...
[10 points] An elastic-perfectly plastic material element is subjected to proportional loading.
The ratio of the principal stress is given as (2\sigma ,\sigma ,0). According to the Mohr-Coulomb
criterion: m\sigma _(1)-\sigma _(3)=f_(c), find the yield stress \sigma and the principal plastic strain increment
vector (d\epsi _(1)^(p),d\epsi _(2)^(p),d\epsi _(3)^(p)) based on the associated flow rule.